But, first of all, let's have a look at the hardware. There are open source applications that support this programmer. Also, some source codes are available from manufacturer. Drivers are available from manufacturer's website (but the site is written in Chinese). The problem with these devices is that you get them without any documentation or software. A popular device is the black CH341A MiniProgrammer that you can buy for 2 to 5 USD. The IC is somehow limited in this configuration, because the programmer makes use only of the SPI and I 2C interface and leaves a lot of pins unconnected. CH341A is used by some cheap memory programmers. The chip is manufactured by Chinese company Jiangsu QinHeng Ltd. An overview of CH341A devices with driver and tools download linksĬH341A is an USB interface chip that can emulate UART communication, standard parallel port, memory parallel port and synchronous serial (I2C, SPI). Take a look at the schematic of this versatile programmer to learn how to use it properly.

Download mini usb pinout for free